I've heard anywhere from 12 to 18 inches. My largest was about 5 inches the last time I measured, but he's grown a little since then, the other 2 are sitting around 4.5 inches. I figure I'll put them in the 77gal, and see how big they get. If they keep growing, then hellllllo 150gal  .
__________________
5gal : Planted and cycling.
10gal : 2 Harlequin Rasbora's, 3 White Cloud Minnows, 1 Common Pleco, 2 Fathead Minnows, assorted plants
34gal : 6 Black Skirt Tetra's, 4 Tiger Barbs(3 Albino), 4 Red-tailed Green Cory's, 3 Silver Mollies, 1 Bristlenose Pleco, 1 Bumblebee Catfish, 1 Crayfish, assorted plants
77gal : Brackish tank, 3 Colombian Sharks, 5 Knight Gobies, 2 Archerfish |